Abstract
BACKGROUND: Intracranial Meningeal Sarcomatosis (MS) is a rare neoplasm of the central nervous system (CNS), characterized by diagnostic challenges and a poor prognosis. This study aimed to utilize Surveillance, Epidemiology, and End Results (SEER) population data to identify prognostic factors and develop a nomogram for overall survival (OS) in patients with intracranial malignant MS between 2000 and 2021. METHODS: Data of 43 patients diagnosed with malignant MS extracted from the SEER registry from 2000 to 2021 were analyzed. Univariate and multivariable Cox regression analyses were performed to examine factors influencing OS. Nomogram for predicting 1-, 3-, 5- years overall survival probability was created based on the multivariate Cox regression model. Additionally, a literature review of intracranial MS was carried out. RESULTS: A total of 43 patients with malignant MS, spanning all ages, were identified from 2000 to 2021. The gender distribution was 62.8% female (27 patients) and 37.2% male (16 patients). White patients constituted 67.4% of the cohort, and Spanish-Hispanic-Latino patients made up 93% of the total population. Five variables (age, sex, grade, total number of in situ/malignant tumors, surgical resection combined radiation) were brought into multivariate Cox regression to identify the independent prognostic factors for OS. A comprehensive model was developed utilizing four predictors identified through multivariate Cox regression analysis. Additionally, there were 13 literatures accessible with intracranial MS in previous studies for review. CONCLUSION: This SEER study identifies important prognostic factors for malignant MS. While suggesting benefits of comprehensive treatment, the findings are limited by sample size and require validation in larger, prospective multicenter studies.